“For me, it really was just about circumstance - I had a great job, I always thought maybe I wanted children and I suppose, in hindsight, I probably did leave it too late and I was very lucky with the way things played out.

“We were trying to conceive for a couple of years on and off, and that was difficult mainly due to my husband and I’s hectic lifestyles where we were both travelling a lot.”

A post shared by Rebecca Maddern (@rebeccamaddern) on May 24, 2018 at 3:18pm PDT

One of the benefits of being an older mum is financial stability, Maddern said.

“I’m far more financially stable than I was when I was 25 or 30.

“I think I also have a more mature approach to parenting - I’ve had more life experience so I feel a lot calmer I think than I would have if I was 25 and having Ruby.”

Rebecca Maddern and husband Trent Miller attend on Derby Day at Flemington Racecourse on November 4, 2017 in Melbourne, Australia (Getty)

Medical expert Dr Ric Gordon said more and more women are having children later on in their lives.

“There’s a range of reasons for this, the financial side of things is one reason why, another is that more women are prioritising their careers,” he toldTODAY.

“You can always have a career but you can’t always have children and I think women are allowed that choice as long as they know those facts.”

Risks of falling pregnant later in life

Dr Gordon said just about every risk increases the longer you wait to have a baby.

“Risks of the baby suffering genetic problems go up, risks of miscarriage, blood pressure problems, having your baby earlier, difficulty actually having the baby, there’s a range of risks that increase as time goes on,” he said.

Baby Ruby (Instagram)

Social pressure

Constant pressure from society and even family members to “hurry up” and have kids is another challenge older mums have to deal with.

“Since I was in my mid-twenties, and now I’m in my early 30’s, people have been saying ‘put your skates on’, ‘hurry up’, ‘have babies’, ‘don’t wait’, and I find it quite insensitive because it is such a personal thing,” Jeffreys admitted.

However, Maddern stressed that, “If I had my time again I wouldn’t have waited so long.

“I was well aware of the risks when I was pregnant and it is in the back of your mind however, before I had the trouble with the IVF, I did think that I wouldn't be one of those statistics - I was a really fit and healthy person but that is irrelevant when you’re talking about your eggs.

“It does make it so much more difficult when you start bypassing the age of 35 and I really was just one of the lucky ones.

“A lot of women think IVF is a Plan B, but for a lot of people, it doesn’t actually work.”

Regardless, Maddern said having baby Ruby was “the best thing I’ve ever done”.